Response of experimental pain to analgesic drugs. 1. Morphine, aspirin, and placebo.
D000698:Analgesia; D001241:Aspirin / Q000627:therapeutic use*; D002986:Clinical Trials as Topic; D003080:Cold Temperature; D004558:Electric Stimulation; D005260:Female; D007839:Functional Laterality; D006801:Humans; D008297:Male; D009020:Morphine / Q000627:therapeutic use*; D010146:Pain; D010919:Placebos
D010919:Placebos; D009020:Morphine; D001241:Aspirin